c#winFrom实现加载动画

public partial class FrmLoading : Form

{

private static Image m_Image = null;

private EventHandler evtHandler = null;

private ParameterizedThreadStart workAction = null;

private object workActionArg = null;

private Thread workThread = null;

private TableLayoutPanel tableLayoutPanel1;

public Label lbMessage;

private Panel panImage;

public string Message

{

get

{

return lbMessage.Text;

}

set

{

lbMessage.Text = value;

}

public bool WorkCompleted = false;

public Exception WorkException

{ get; private set; }

public void SetWorkAction(ParameterizedThreadStart workAction, object arg)

{

this.workAction = workAction;

this.workActionArg = arg;

}

public FrmLoading(string msg)

{

InitializeComponent();

this.Message = msg;

}

protected override void OnPaint(PaintEventArgs e)

{

base.OnPaint(e);

if (m_Image != null)

{

//获得当前gif动画下一步要渲染的帧。

UpdateImage();

//将获得的当前gif动画需要渲染的帧显示在界面上的某个位置。

int x = (int)(panImage.ClientRectangle.Width - m_Image.Width) / 2;

int y = 0;

//e.Graphics.DrawImage(m_Image, new Rectangle(x, y, m_Image.Width, m_Image.Height));

panImage.CreateGraphics().DrawImage(m_Image, new Rectangle(x, y, m_Image.Width, m_Image.Height));

}

if (this.WorkCompleted)

{

this.Close();

}

private void FrmProcessing_Load(object sender, EventArgs e)

{

if (this.Owner != null)

{

this.StartPosition = FormStartPosition.Manual;

this.Location = new Point(this.Owner.Left, this.Owner.Top);

//MessageBox.Show(string.Format("X={0},Y={1}", this.Owner.Left, this.Owner.Top));

this.Width = this.Owner.Width;

this.Height = this.Owner.Height;

}

else

{

Rectangle screenRect = Screen.PrimaryScreen.WorkingArea;

this.Location = new Point((screenRect.Width - this.Width) / 2, (screenRect.Height - this.Height) / 2);

}

//为委托关联一个处理方法

evtHandler = new EventHandler(OnImageAnimate);

if (m_Image == null)

{

Assembly assy = Assembly.GetExecutingAssembly();

//获取要加载的gif动画文件

FileStream fs = File.OpenRead(Application.StartupPath + "//image//cc.jpg"); //OpenRead

int filelength = 0;

filelength = (int)fs.Length; //获得文件长度

Byte[] image = new Byte[filelength]; //建立一个字节数组

fs.Read(image, 0, filelength); //按字节流读取

m_Image = Image.FromStream(fs);

}

//调用开始动画方法

BeginAnimate();

}

//开始动画方法

private void BeginAnimate()

{

if (m_Image != null)

{

//当gif动画每隔一定时间后，都会变换一帧，那么就会触发一事件，该方法就是将当前image每变换一帧时，都会调用当前这个委托所关联的方法。

ImageAnimator.Animate(m_Image, evtHandler);

}

//委托所关联的方法

private void OnImageAnimate(Object sender, EventArgs e)

{

//该方法中，只是使得当前这个winform重绘，然后去调用该winform的OnPaint（）方法进行重绘)

this.Invalidate();

}

//获得当前gif动画的下一步需要渲染的帧，当下一步任何对当前gif动画的操作都是对该帧进行操作)

private void UpdateImage()

{

ImageAnimator.UpdateFrames(m_Image);

}

//关闭显示动画，该方法可以在winform关闭时，或者某个按钮的触发事件中进行调用，以停止渲染当前gif动画。

private void StopAnimate()

{

m_Image = null;

ImageAnimator.StopAnimate(m_Image, evtHandler);

}

private void FrmProcessing_Shown(object sender, EventArgs e)

{

if (this.workAction != null)

{

workThread = new Thread(ExecWorkAction);

workThread.IsBackground = true;

workThread.Start();

}

public void ExecWorkAction()

{

try

{

var workTask = new Task((arg) =>

{

this.workAction(arg);

},

this.workActionArg);

workTask.Start();

Task.WaitAll(workTask);

}

catch (Exception ex)

{

this.WorkException = ex;

}

finally

{

this.WorkCompleted = true;

}

private void InitializeComponent()

{

this.tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();

this.panImage = new System.Windows.Forms.Panel();

this.lbMessage = new System.Windows.Forms.Label();

this.tableLayoutPanel1.SuspendLayout();

this.SuspendLayout();

//

// tableLayoutPanel1

//

this.tableLayoutPanel1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)

| System.Windows.Forms.AnchorStyles.Left)

| System.Windows.Forms.AnchorStyles.Right)));

this.tableLayoutPanel1.ColumnCount = 1;

this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 50F));

this.tableLayoutPanel1.Controls.Add(this.panImage, 0, 1);

this.tableLayoutPanel1.Controls.Add(this.lbMessage, 0, 0);

this.tableLayoutPanel1.Location = new System.Drawing.Point(0, 0);

this.tableLayoutPanel1.Name = "tableLayoutPanel1";

this.tableLayoutPanel1.RowCount = 2;

this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 50F));

this.tableLayoutPanel1.Size = new System.Drawing.Size(1290, 812);

this.tableLayoutPanel1.TabIndex = 0;

//

// panImage

//

this.panImage.Dock = System.Windows.Forms.DockStyle.Fill;

this.panImage.Location = new System.Drawing.Point(3, 409);

this.panImage.Name = "panImage";

this.panImage.Size = new System.Drawing.Size(1284, 400);

this.panImage.TabIndex = 1;

//

// lbMessage

//

this.lbMessage.AutoSize = true;

this.lbMessage.Font = new System.Drawing.Font("宋体", 12F);

this.lbMessage.ForeColor = System.Drawing.Color.Black;

this.lbMessage.Location = new System.Drawing.Point(590, 350);

this.lbMessage.Margin = new System.Windows.Forms.Padding(590, 350, 3, 0);

this.lbMessage.Name = "lbMessage";

this.lbMessage.Size = new System.Drawing.Size(56, 16);

this.lbMessage.TabIndex = 0;

this.lbMessage.Text = "label1";

this.lbMessage.Visible = false;

this.ClientSize = new System.Drawing.Size(1290, 812);

this.Controls.Add(this.tableLayoutPanel1);

this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;

this.Name = "FrmProcessing";

this.Opacity = 0.3D;//透明级别

this.ShowInTaskbar = false;

this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;

this.Load += new System.EventHandler(this.FrmProcessing_Load);

this.Shown += new System.EventHandler(this.FrmProcessing_Shown);

this.tableLayoutPanel1.ResumeLayout(false);

this.tableLayoutPanel1.PerformLayout();

this.ResumeLayout(false);

}

//定义引用方法

public static void ShowLoading(string msg, UserControl owner, ParameterizedThreadStart work, object workArg = null)

{

FrmLoading processingForm = new FrmLoading(msg);

dynamic expObj = new ExpandoObject();

expObj.Form = processingForm;

expObj.WorkArg = workArg;

processingForm.SetWorkAction(work, expObj);

processingForm.ShowDialog(owner);

if (processingForm.WorkException != null)

{

throw processingForm.WorkException;

}

调用方式

ShowLoading("", this, (obj) =>

{

//执行操作

}, null);

cc.jpg